Buffer overflow in Re2c
CVE-2020-11958
re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.000
Affected products
- Re2c — versions 1.3
- Canonical Ubuntu Linux — versions 19.10, 20.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blogs.gentoo.org/ago/2020/04/19/re2c-heap-overflow-in-scannerfill-scanner-cc/ (Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/04/19/1 (Mailing List, Third Party Advisory)
- github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/04/21/1 (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4338-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4338-2/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202007-28 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11958?
- CVE-2020-11958 is a high-severity vulnerability in Re2c, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-04-21.
- How severe is CVE-2020-11958?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-11958 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.